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block: fix resource leak in blk_register_queue() error path

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[ Upstream commit 40f2eb9b531475dd01b683fdaf61ca3cfd03a51e ]

When registering a queue fails after blk_mq_sysfs_register() is
successful but the function later encounters an error, we need
to clean up the blk_mq_sysfs resources.

Add the missing blk_mq_sysfs_unregister() call in the error path
to properly clean up these resources and prevent a memory leak.

Fixes: 320ae51fee ("blk-mq: new multi-queue block IO queueing mechanism")
Signed-off-by: Zheng Qixing <zhengqixing@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20250412092554.475218-1-zhengqixing@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zheng Qixing
2025-04-12 17:25:54 +08:00
committed by Greg Kroah-Hartman
parent a8a3b61ce1
commit 549cbbd14b
1 changed files with 2 additions and 0 deletions
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2
block/blk-sysfs.c
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@@ -854,6 +854,8 @@ out_unregister_ia_ranges:
out_debugfs_remove:
blk_debugfs_remove(disk);
mutex_unlock(&q->sysfs_lock);
if (queue_is_mq(q))
blk_mq_sysfs_unregister(disk);
out_put_queue_kobj:
kobject_put(&disk->queue_kobj);
mutex_unlock(&q->sysfs_dir_lock);